pooping problem

2 of the three kittens that are amonth old now are having a problem pooping. they meow constantly before they poop and when they do the little poops are rock hard. is there anything i can ive them that will help them poop, or soften it a little? ive only found this problem last night and had to wipe ones kittens bum because the poop would not fall off. i really need some help!!

I assume that the kittens are still nursing, is that correct? Is the mother getting enough fluids in her diet? If not, it could be affecting the kittens being constipated.

Other than that, my only advice is to contact your veterinarian.